Cushion joint for the springs of automobiles



Aug. 12,l 1930.` H. s. Pow-ELL I 1,772,730

CUSHION JOINTFOR THE SPRINGS OF AUTMOBILES Filed Agg. 3, 1927 2 sheets-sheet 1 y CUSHION JOINT FOR THE .SPRINGS OF AUTOMOBILES Patented Aug, 1930 UNITED sTA Tas-PATENT OFFICE y HERBERT s. rowELL, oF Urrea, NEW Yon'x CUSEIONUOINT FOB THE SPRINGS F AUTOMOBILES Application led August 3, 1927. Serial No. 210,410.

' My invention relates to a cushion joint for` mobile, to the spring ends. By employing such a'cushion ljoint no lubricant is necessary to prevent squeaking, also the possibility of y breaking thespring because'of lack of lubrication, is eliminated and furthermore, such a joint always insures easy riding qualities of the automobile.l The object will appear by reference to the .drawings in which: t

Fig. 1`is a central vertical section of the f5 joint shown assembled to the shackle of' an automobile.

Fig. 2 is a detail perspective view of the tube employed. Fig. 3 is a detail view showing a central longitudinal section of the tube in Fig.- 2. Fig. 4 is av detail view showing a modliied formpf a partemployed.

Fig. 5 is a perspective view of a machine for forming the rubber joints.

tive of rubber joint.

Fig. 7 is a l detail view showing a central ings, the invention embodies a hollow tube.

1 having its exterior as well as its linterior formed into a polygonal sided member, here shown as a hexagon. Peripheral grooves 5 5 0 leaf spring 8.,l

Fig. 6.1is a detail view showing a perspectegral with end lplate are made in the exterior. Although four such' grooves 5 are shown any number could be used to suit thelrequirements of the particular joint. Grooves 5 are adapted to-receive portions 6 of the rubber bushing 7 when conn pressed about tube 1, whereby to prevent said rubber bushing 7 from moving longitudinally with reference to. tube"1. This is desirable in orderfto prevent lateral swaying of leaf spring 8. Rubber bushing 7 is compressed,

4by means hereinafter described, into a metallic cylinder 10, whereby it can be assembled in a cartridge like manner to the end of the 'j In order to thus assemble the joint .to the end of the spring 8, the 'cylinder 1() containing rubber bushing 7 compressed about tube 1 is projected through the loop at the end of spring 8. An annular shoulder l5 formed on the exterior of cylinder 10 will aid in holding 'cylinder 10 from moving longitudinally with reference to spring 8. A shackle bolt 16 having a hexagonal or polygonal exterior corresponding to the hexagonal or polygonal interior of tube 1 is projected through 'said interior of tube 1. Inasmucli as said bolt 16 and tube 1 are equipped with said hexagonal faces, there will be no rotary movement of said parts relative to each other. Further-- more, said hexagonal bolt 16 has bearings in the hexagonal holes 17, 17 formed in the depending members 18, 18 of the shackle yoke 20, whereby toprevent said bolt from revolving in its bearings with respect to yoke 20. Nuts 21,21 are screw mounted to the threaded ends of shackle bolt `16,1whereby to'hold the parts in assembled position.

The means for compressing rubber bushing 7 tightly against tube 1 in such manner that portions 6 of rubber bushing 7 enter grooves 5 `of tube 1 embodies a sliding member 30 actuated in guide grooves 30, 30a in sides 31, 31 of form 32 by Worm 33. -Worm 33 engages like threads in boss 34 ,formed'in- 35' which is /bolted to sides 31, 31." A` hand wheel 36 is attached to the end of worm 33 whereby to turn it, and

thereby, actuate member 30. The opposite end of worm 33 is swiveled tosliding member 30. The forward part ofmember 30 has a round or concaved surface at`37 which cooperates with the round surface 38 at the end of rece'ss 39, whereby to compress rubber bushing 7 therebetween and against the outer surfacev of tube l. Furthermore, recess 39 is reduced at 39a to aid in compressing rubber bushing 7.

The means for inserting rubber bushing 7 with tube 1 therethrough in-tocylinder 10 embodies a vertically movable pressing member 40, which slides on vertical shafts 41, 41.

Pressing member 40 is actuated by means of arack 42 rigidly attached thereto at, 43. Said rack 43 is engaged by spur pinion 44 mounted to turn with shaft 45 having bearings in journals 4G, 46, clamped or bolted to the up'- pcr ends of shafts 41, 41. Hand Wheel 50' is fixed to turn shaft 45. v y

Acylinder 10 is disposed in upright position beneath form 32 and just below the end 38 of recess 39a whererubber bushing 7 is compressed. Rubber bushing 7 with tube 1 therethrough is disposed in recess 39 in front of member 30 as shown in Figure 5 and will be pushed longitudinallyinto the reduced part 39 of recess 39 -and up ..against the end 38 thereof by movable member 30. The end of recess 39 and the concaved surface 37 of member 30 areenlarged slightly 39b at the lower part thereof to allow for the thickness of cylinder 10, whereby theinterior of said cylinder 10 will align with the interior surface of form 32 at recess 39 and concaved surface 37 of member 30.- T his alignment Will allow rubberbushing 7 to be pushed down into cylinder 10 by member 40. A lubricant can be brushed over the contacting surface relative tothe pressing of bushing 7 into cylinder 1 0.

An extra cylindrical shaft 51 is placed in np-4 right position Vbetween the adjacent upright end' of tube 1 and under surface of movable 'member 40. Wheel 50 isturned then to force A vsaid member 40 down which will in turn force rubber bushing 7 into cylinder 10.

Figure 4 shows a modification embodying a member 55 that corresponds to bolt 16 and actuating said member, whereby to compressa yielding member, another movable member cooperating with said first named member for forcing said yielding member into a casing, a rack attached to Said second named movable member and a gear meshing with said rack, whereby to actuate said last named movable member.

4. In a machine for forming 'a cushion joint for thc springs of automobiles, a frame having a recess with a reduced part, a mem-v Lber movable in said recess, means for actuating said member, whereby to compress a rubber cylinder into the reduced part of said recess, a vertically movable member mounted on said frame for forcing said compressed rubber cylinder into a casing, a rack attached to said vertically movable member. a gear meshingwith said rack and means for turning said gear, whereby to actuate said vertically movable member.4

5. In a machine for forming a cushion joint for the springs of automobiles, a frame having a recess with a reduced portion, a member movable in said recess` means for actuating said member, whereby to compress a member in said reduccdportion of the recess, a vertically movable member, mounted on said frame, a rack attached to said vertically `movable member, a gear meshing with said rack, and a wheel for-turning said gear, whereby to actuate said vertically movable member to force said rubber member'into a casing.v I 1 In testimony ivvhereofI have affixed my signature.- 5

HERBERT S. POWELL.

sleeve 1 of the former construction, here made I as one piece.

Having thus described my invention what' I claim as new and desire to obtain by Letters Patent is as follows:

1. In a machine for formingfa cushion joint for the springs of automobiles, means for compressing a rubber cylinder and other 

